Etymology

cocoon

C3O1C3O1O1N1

Today it means: The silky case spun by the larvae of some insects in which they metamorphose, protecting the pupa within. Full definition →

French cocon
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The story

  1. French · derived fromcocon
  2. English todaycocoon

From French cocon, a diminutive of coque (“shell”).

Etymology from Wiktionary, CC BY-SA 4.0.